Java command usage

Executing a system command is relatively simple – once you’ve seen it done the first time. It involves the use of two Java classes, the Runtime class and the Process class. Basically, you use the exec method of the Runtime class to run the command as a separate process .

Learn TOP-20 Java Commands in 2021

Use these options to configure your JVM . The options prefixed with -X are nonstandard. For options that take a <size> parameter, suffix the number with “k” or “K” to indicate kilobytes, “m” or “M” to indicate megabytes, or “g” or “G” to indicate gigabytes.

The java command starts a Java application . It does this by starting a Java runtime environment, loading a specified class, and calling that class’s main method. By default, the first argument without an option is the name of the class to be called.